A dog who is "leash reactive" is most likely experiencing some anxiety, fear or discomfort associated with other dogs. The situation is worse on a lead because your dog can’t approach in a safe and relaxed way.
Digging dogs can make a real mess of the garden. These budding archaeologists have many reasons to dig. They will dig to join in with you if you like to garden, they will dig a hole to keep cool, bury bones or out of boredom. Each cause needs a specific solution.